Improved vise



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Leners Patent No. 93,454, daad August 1o, 1869.

v IMPROVED VISIE.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern Be it known that I, J AMES'LARKIN, of Detroit, in the county of YVayne, and State of Michigan, have invented new and useful Improvements in Vises; and I do hereby declare that the following is a-'full and exact description ofthe construction andV operation of the same, reference being had to the accompanying drawings, making a part of this specication.

I' construct my vise/as shown on the drawings.

The partA represents the main or stationary-jaw and shank of the vise.

The part B represents the movable jaw.

rIhe part @represents a tube or pipe, which is cast on the back of the jaw A, large yenough in bore for the main screw D and screw-cover E to pass through, and long enough to protect the screw from yanything falling on it. I

The part F is a flat plate,'which is also cast on the back of the jaw A, under and joined to the pipe C, wide andlong enough t0 be bolted firm to the bench.

The part G is ainut, whichI t into the pipe C from under, and through the plate F, suitable -for the main screw D, which the vise is worked by.

' I fasten the nut G in its place by means ota taperheaded screw, lettered H, which I screw into the plate .l through a hole ina part of the nutG, which is constructed for that-purpose. 'lhe part I is a stay or bracing-screw, made to revolve by means of the spur-pinions o, which are put on tight, one on the screw D, and another on the screw I, and a third, as intcunediate, revolving loose on the stud P.

rlhe workin g of the said'pinious, being the same size, and the screws being the sainepitch, causes the jaw B to work backward and -tbrward parallel. Y

The part K represents a piece or way, cast on and at right angles to the jaw and shank A. v

'I he part L represents a piece cast on and at right angles to the jaw B, and fitted to slide between two flanges on theway K, and also through a slot in the shank A.

The part a is a web, cast under the way K, to strengthen it. p

The part-M is a boltlet through a hole in the shank A, to bolt it steady to the bench, and also as a support under the way K, which the jaw B partly rests upon.

'.lhe part S represents-a chamber in apart of the jaw B, suitable for the pinions o to t into, in order to cover them o n the outside, to prevent any chips tiom falling between them.

The part T represents the step end of the screw' I, which is fitted with a square shoulder, to rest against the jaw B, in order to be a stay against it.

I also have a collar on each end of the screw I, if I consider it necessary. A

.The parts R represent steel-faces, which I put on I and make fast to the jaws A and B.

lhe part Q is the handle, which the main screw D is turned by. V

E represents a circular part on the end of the screwcover, which is'bored to h't loose over the screw. D. The remaining part of the screw-cover E is asegment.

N represents a collar, which I t tight on the screw D, inside, and close to the end of the` screw-cover E.

The pinion o also being tight on the screw D, -outside, and close to the end ofthe screw-coverE, causes it to travel backward and forward with and over the screw D, through the pipe G, over and resting on the uut G, proteetipg the main screw D from anything falling on it.

It' I think it best, I can have a left-hand thread on the screw-I, and only u se two pinions,v instead of three.

'lhisvise is Vso `adapted that I can eut it into three diiierent lengths, as shown by the stripes on the shank A, the small size extending only'to'the first stripe, not embracing the slide or way, a .larger size, extending to the lower stripe, embracing both slide and way, and the larger one still, embracing all, with the .shank A the full length, extending tothe floor.

I wish to mention that a thin plate, by which the pinions o are covered, is shown, lettered c, and, as shown, fastened, by means of screws, to the jaw. "B, outside of the pinions. Also the collars on the ends of the screw I, lettered W, are put on, one to prevent the screws from being unscrewedout of the-nuts, and the other to tend to move the jaw B {b1-ward square and steady.

For small vises, I bore a hole through the shank A, and cut a thread into it, suitable for the screw I; but for large vises, I fit a separate uut into it for that purpose. v Y

What I claim as my invention, and desire to secure by Letters Patent, is A l. The construction and arrangement of the jaws A A B, actuating-screw D, provided with annular shoulders N 0, and the sheath E, formed with a circular collar at Vone end, all tted together substantially as desclibed.

c 2. The combination of the screws D I, operated described, to maintain the parallelism of the jaws, with the sheath c, for turning oli' chips, dirt, and refuse and falling material, as set forth.

JAMES LARKIN.

Titresses DAVID It. PEIRCE, .Lures W. BARTLETT.- 

